ASTAbstract Syntax Tree Tools

Quick Example ​

import { parse } from '@sylphlab/ast-javascript';

const code = `
  const greeting = "Hello, World!";
  console.log(greeting);
`;

const ast = parse(code);
console.log(ast);

Architecture Overview ​

The AST toolkit follows a layered architecture:

┌─────────────────────────────────────────┐
│  @sylphlab/ast-javascript               │
│  (JavaScript-specific parser)           │
└────────────────┬────────────────────────┘
                 │ depends on
                 ▼
┌─────────────────────────────────────────┐
│  @sylphlab/ast-core                     │
│  (Generic AST interfaces & types)       │
└─────────────────────────────────────────┘

Parsing Flow ​

Source Code (String)
       │
       ▼
  ANTLR Lexer
  (Tokenization)
       │
       ▼
  ANTLR Parser
  (Parse Tree)
       │
       ▼
  Custom Visitor
  (Transformation)
       │
       ▼
  Custom AST
  (@sylphlab/ast-core types)

Why Choose AST? ​

The Problem ​

Traditional AST tools are often:

• Tightly coupled to single languages
• Difficult to extend or customize
• Limited type safety
• Complex integration

The Solution ​

AST Toolkit provides:

• Clean, extensible architecture
• ANTLR-powered parsing
• Full TypeScript type safety
• Monorepo structure for modularity

The Result ​

Production-ready AST parsing with a foundation for supporting any programming language.

Technology Stack ​

Getting Started ​

Ready to build AST parsers? Get started with our comprehensive guide:

Community ​

• Follow us on Twitter/X
• Report issues on GitHub
• Email us at hi@sylphx.com